Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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030
CDUS41 KLWX 152138
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
438 PM EST MON DEC 15 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 15 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 27 1:47 PM 71 1971 47 -20 39
MINIMUM 14 5:16 AM 5 1989 29 -15 32
AVERAGE 21 38 -17 36
PRECIPITATION (IN)
TODAY 0.00 2.49 2018 0.11 -0.11 0.33
MONTH TO DATE 0.87 1.70 -0.83 1.92
SINCE DEC 1 0.87 1.70 -0.83 1.92
SINCE JAN 1 29.75 41.64 -11.89 32.95
SNOWFALL (IN)
TODAY 0.0 4.7 1981 0.1 -0.1 T
MONTH TO DATE 2.0 1.2 0.8 T
SINCE DEC 1 2.0 1.2 0.8 T
SINCE JUL 1 2.0 1.5 0.5 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 44 27 17 29
MONTH TO DATE 500 384 116 427
SINCE DEC 1 500 384 116 427
SINCE JUL 1 1293 1284 9 1095
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1330 1231 99 1586
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 10.1
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 61 6:00 AM
LOWEST 44 3:00 PM
AVERAGE 53
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 72 1971
MINIMUM TEMPERATURE (F) 29 9 2016
SUNRISE AND SUNSET
DECEMBER 15 2025......SUNRISE 7:21 AM EST SUNSET 4:49 PM EST
DECEMBER 16 2025......SUNRISE 7:22 AM EST SUNSET 4:49 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$